Syrian refugee children

Nikolay Doychinov/AFP/Getty Images

A boy holds wooden sticks in a tent of a refugee camp set in the Bulgarian town of Harmanli, south-east of Sofia. Bulgaria's asylum centers are severely overcrowded after the arrival of almost 10,000 refugees this year, half of them Syrian.

A boy holds wooden sticks in a tent of a refugee camp set in the Bulgarian town of Harmanli, south-east of Sofia. Bulgaria's asylum centers are severely overcrowded after the arrival of almost 10,000 refugees this year, half of them Syrian. (Nikolay Doychinov/AFP/Getty Images)

A boy holds wooden sticks in a tent of a refugee camp set in the Bulgarian town of Harmanli, south-east of Sofia. Bulgaria's asylum centers are severely overcrowded after the arrival of almost 10,000 refugees this year, half of them Syrian.